Improvement in lamp-collars



UNITED STATES PATENT OEEIoE.

THEODORE WVEBER AND FRANZ H. KANTRSZINSKY, OF NEW YORK, N. Y.

IMPROVEMENT IN LAMP-COLLARS.

Specification forming part of Letters Patent No. 151,636, dated June 2,1874; application filed May 14. 1874.

To all whom it may concern Be it known that we, THEODORE A. WEBER andFRANZ H. KANTRSZINSKY, both of the city, county, and State of New York,have invented a new and useful Improvement in Securing Lamp-Collars; andwe do hereby declare the following to be a full, clear, and exactdescription thereof, which will enable those skilled in the art to makeand use the same, reference being had to the accompanying drawingforming part of this specification, in which drawing Figure 1 is asectional side view of our invention as applied to a lamp. Fig. 2 is ahorizontal section thereof in the line as as, Fig. 1, looking in thedirection of the arrow marked opposite to that line. Fig. 3 is avertical central section of the collar detached.

Similar letters indicate corresponding parts.

This invention relates to a mode of securing collars to lamps withoutthe use of cement, so as to save time and labor and at the same timeimprove the finish of the article. Our invention consists in providingthe collar with spurs or protuberances, which are adjusted in inclinedgrooves upon the neck of the lamp, in combination with a spring-catch,which is held by ratchets upon the said neck in such a manner as to lockthe collar in position.

In the drawing, the letter A designates the body of a lamp. B is itsneck, and O is the rin g or collar, which is provided with a threadedportion, D, for receiving the lamp burner. The body and neck of the lampare of glass, being made in the usual manner in one and the same mold,and upon the neck B are two or more inclined grooves, a. These groovesare, preferably, formed at the time of molding the lamp, as justmentioned, and they are provided with an upright branch, I), foradmitting the spurs of the collar to the inclined grooves, ashereinafter specified. Upon the neck B we form, also, a rack orratchets, E, at the time of molding the lamp. The collar 0 is of sheetmetal, and on the inside thereof are two or more spurs or protuberances,c, which are formed by dies or press-tools directly in the side of thecollar, or they are made in the form of pins and soldered or rivetedthereto, as desired by the maker. On the inside of the collar we affix,also, a spring-catch or detent, d, in any suitable manner, the samebeing so located that it engages the ratchets E when the collar isplaced upon the neck, as shown in Fig. 2.

In proceeding to secure the collar upon the neck of the lamp, we adjustthe spurs 0 into the branch grooves b, and at the same time compress thespring-catch d between the inside of the collar and the surface of theneck. The collar is then shoved downupon the neckuntil the spurs arebrought in linewith theinclined grooves a, and the catch (1 is broughtupon the rack or ratchets E, when the catch will expand and engagetherewith. By now turning the collar in the direction of the inclinedgrooves the spurs 0 are caught under the edges .thereof and the collaris drawn down tight upon the neck, while the spring-catch moves over andis held by the ratchets E, so as to prevent a return movement of thecollar. The collar is thus effectually locked in position. In the top ofthe collar is a gasket or packingring, 6, whereby an elastic and tightjoint is effected with the edge of the neck of the lamp. By thisarrangement we dispense with the use of cement in securing the collar,while we provide a more substantial and lasting joint withoutcomparatively increasing the expense of manufacture of the article, ifat all.

WVhat we claim as new, and desire to secure by Letters Patent, is-

The collar O, having spurs or pro'tuberances c and a detent or catch, d,in combination with the neck B of a lamp having grooves a 7),substantially as described, for the purposes specifled.

This specification signed by us this 6th day of May, 1874.

' THEODORE A. 'WEBER.

FRANZ H. KANTRSZINSKY. Witnesses:

E. F. KASTENHUBER, CHAS. WAHLERS.

